Crossbow stock



FIG. 1 is a perspective view of my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a top view thereof.

The broken lines in FIGS. 1-6 are for illustrative purposes and form no part of the claimed design. 

CLAIM I claim the ornamental design for a crossbow stock, as shown and described. 